Senior UI Developer

📍 Job Overview

Job Title: Senior UI Developer

Company: Avnet (Farnell)

Location: Leeds, United Kingdom

Job Type: Full-Time

Category: Software Engineering / Front-End Development

Date Posted: 2026-06-02

Experience Level: 5-10 Years

Remote Status: Hybrid

🚀 Role Summary

• Drive the development and maintenance of a large-scale, global eCommerce platform with a focus on creating beautiful, functional, and user-centric designs.

• Implement advanced front-end solutions using React, Node.js, and Apollo Client to deliver responsive, high-performance user interfaces for a seamless customer experience.

• Collaborate within a cross-functional team, including Product Owners, UX Designers, and back-end developers, to build scalable and visually stunning user interfaces.

• Focus on key eCommerce functionalities such as personalization, recommendations, merchandising, and marketing content delivery to enhance customer engagement and drive site revenues.

📝 Enhancement Note: While the provided title is "Senior UI Developer," the description heavily emphasizes front-end development for an eCommerce platform, involving core technology stacks like React and Node.js. This role is positioned within a broader software engineering context, focusing on the user interface layer of a complex digital product. The "Revenue Operations" or "Sales Operations" categorization is not applicable here.

📈 Primary Responsibilities

• Lead the design and implementation of highly interactive and user-friendly web applications using React and its associated libraries, ensuring a visually appealing and intuitive customer experience.

• Translate complex business requirements and UX/UI designs (from Figma and Storybook) into robust technical solutions, working closely with Product Owners and back-end engineers to ensure seamless integration and a cohesive e-commerce journey.

• Champion and implement UI performance optimizations, focusing on fast load times, smooth navigation, and a reactive user experience across all devices and browsers.

• Master data fetching and state management techniques using Apollo Client, integrating the front-end with RESTful and GraphQL APIs powered by Node.js and Apollo Server.

• Uphold and promote software development best practices, including writing clean, maintainable code, implementing comprehensive automated testing strategies (e.g., Jest), and conducting thorough code reviews.

• Mentor and guide junior and mid-level developers, sharing expertise in React development, front-end architecture patterns, and best practices for scalable UI development.

• Partner with back-end engineers to facilitate seamless integration between front-end and back-end services, contributing to the overall architecture and performance tuning of the application stack.

• Utilize A/B testing tools like Adobe Target to experiment with different UI variations and drive data-informed decisions for continuous improvement and revenue optimization.

📝 Enhancement Note: The responsibilities are typical for a Senior Front-End Developer role focused on an eCommerce platform, with a strong emphasis on React, performance, and collaboration. The mention of driving "conversations and higher site revenues" hints at a GTM alignment, but the core function remains in UI development.

🎓 Skills & Qualifications

Education: While no specific degree is mandated, a Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience, is highly recommended for a Senior-level role.

Experience: A minimum of 5-10 years of progressive experience in front-end development, with a significant portion dedicated to senior-level responsibilities in UI development for large-scale web applications.

Required Skills:

• Proven track record as a Senior Front-End or UI Developer, with extensive hands-on experience in ReactJS.

• Deep proficiency in the core technology stack: ReactJS, TypeScript, Node.js, Jest, Styled Components, Storybook, GraphQL, and Apollo (client/server).

• Strong understanding of modern JavaScript (ES6+) and its ecosystem.

• Expertise in HTML5 and CSS3, including modern layout techniques and best practices.

• Demonstrated experience with responsive design principles and implementation across various devices and screen sizes.

• Proficient in Gitlab and adherence to their GitFlow version control branching strategy.

• Ability to effectively translate UX/UI designs from tools like Figma and Storybook into high-quality, functional user interfaces.

• Strong analytical and problem-solving skills, with a user-centric approach to developing solutions.

• Familiarity with front-end testing frameworks, particularly Jest, and an understanding of its application in ensuring code quality.

• Proven ability to optimize UI performance for large-scale applications using techniques such as lazy loading and code splitting.

• Experience working within an Agile/Scrum development methodology.

• Excellent written and verbal communication skills, with a demonstrated ability to collaborate effectively across diverse teams. Preferred Skills:

• Experience with Loadable Components for optimized component loading.

• Knowledge of Akamai caching strategies for front-end performance enhancement.

• Experience with A/B testing platforms like Adobe Target.

• Familiarity with integrating front-end applications with RESTful APIs.

📝 Enhancement Note: The requirements clearly outline a senior-level front-end developer role with a strong emphasis on the React ecosystem and associated tools. The AI-derived experience level of "5-10 years" aligns well with the "Senior" title and the depth of technical expertise required.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Showcase of complex, interactive user interfaces developed using React, demonstrating proficiency in state management and component architecture.

• Examples of performance optimization strategies implemented, with quantifiable results (e.g., improved load times, reduced rendering times).

• Case studies illustrating collaboration with UX/UI designers and back-end developers to deliver end-to-end features.

• Demonstrations of API integration, particularly with GraphQL and Apollo Client, highlighting data fetching and mutation handling.

• Evidence of contributions to code quality through testing frameworks (Jest) and adherence to best practices. Process Documentation:

• Workflow examples demonstrating how requirements are translated from design mockups (Figma, Storybook) into production-ready code.

• Documentation of experience with Gitlab and the GitFlow branching strategy, outlining pull request processes and code review workflows.

• Examples of performance profiling and optimization efforts, including specific techniques used to enhance UI speed and responsiveness.

• Contributions to or development of component libraries or design systems using tools like Storybook.

📝 Enhancement Note: For a senior UI developer role, a portfolio demonstrating practical application of skills is crucial. The emphasis here is on showcasing complex UI development, performance optimization, collaboration, and adherence to modern development processes and tools.

💵 Compensation & Benefits

Salary Range: Based on industry benchmarks for Senior UI Developers in Leeds, UK, with 5-10 years of experience, the estimated salary range is £55,000 - £75,000 per annum. This estimate considers the cost of living in Leeds, the demand for skilled front-end developers, and the seniority of the role.

Benefits:

• Competitive Salary Package

• Pension Scheme

• Simply Health Plan

• 25 days holiday plus bank holidays

• Option to buy additional holiday days

• Free Onsite Parking

• Flexible Home Working arrangements

• Cycle to Work Scheme

• Reward Schemes

Working Hours: The standard working hours are 40 hours per week, with flexibility offered for home working.

📝 Enhancement Note: The salary range is an estimation based on general UK market data for senior development roles in a major city. Actual compensation will vary based on individual experience, negotiation, and Avnet's internal compensation structure. The listed benefits are directly from the provided input.

🎯 Team & Company Context

🏢 Company Culture

Industry: Avnet operates within the global technology distribution and services sector, with Farnell specializing in high-service distribution of electronic components, systems, and solutions. This industry is characterized by rapid technological advancement, a need for efficient supply chains, and a focus on customer service for engineers and designers.

Company Size: Avnet is a large, publicly traded company with thousands of employees globally. Farnell, as an Avnet company, also represents a significant workforce. This size implies structured processes, established career paths, and a broad range of resources and opportunities, but also potentially more formal decision-making processes.

Founded: Avnet was founded in 1925, and Farnell has a long history in electronic distribution. This longevity suggests stability, a deep understanding of its market, and a culture that values experience and established practices, while also needing to remain agile to technological shifts.

Team Structure:

• The UI development team is part of a larger software engineering or digital product group, likely including back-end developers, QA engineers, DevOps, and Product Owners.

• The Senior UI Developer will report to a Lead Developer, Engineering Manager, or Head of Digital Product.

• Collaboration is expected with UX/UI designers, Product Owners, back-end developers, and potentially marketing or merchandising teams, indicating a cross-functional, agile team environment. Methodology:

• The team operates within an Agile/Scrum framework, implying iterative development cycles, regular stand-ups, sprint planning, and retrospectives.

• Data analysis and A/B testing (via Adobe Target) are integral to the development process, driving decisions for performance optimization and revenue enhancement.

• Workflow planning and optimization are key, with a focus on delivering a seamless and high-performing eCommerce experience.

• Automation practices are likely employed in testing, deployment, and potentially in code generation or scaffolding.

Company Website: https://www.avnet.com/

📝 Enhancement Note: The company context is derived from Avnet's general profile and Farnell's specialization. The team structure and methodology are inferred from the job description's mention of cross-functional teams, Agile/Scrum, and specific tools like Figma and Adobe Target.

📈 Career & Growth Analysis

Operations Career Level: This is a "Senior" level position, indicating a significant level of technical expertise, autonomy, and responsibility. A Senior UI Developer is expected to not only execute complex development tasks but also to mentor others, contribute to architectural decisions, and drive best practices within the team.

Reporting Structure: The role likely reports into a technical lead or engineering manager within the digital product or eCommerce division. This structure allows for clear guidance on technical direction while providing a degree of independence in day-to-day tasks.

Operations Impact: While not a direct "Revenue Operations" role, this Senior UI Developer has a critical impact on revenue. By building and optimizing the user interface of a large-scale eCommerce platform, they directly influence customer experience, conversion rates, average order value, and overall site performance, all of which are key drivers of revenue for Farnell/Avnet.

Growth Opportunities:

• Technical Specialization: Deepen expertise in React, GraphQL, front-end architecture, and performance optimization, potentially becoming a subject matter expert or architect in these areas.

• Leadership Development: Transition into roles like Tech Lead, Engineering Manager, or Architect, taking on greater responsibility for team guidance, project direction, and strategic technical planning.

• Cross-Functional Exposure: Gain broader understanding of eCommerce operations, merchandising, marketing strategies, and back-end systems through close collaboration, opening doors to product management or broader GTM strategy roles.

• Learning & Development: Avnet likely offers continuous learning opportunities, including training, conferences, and certifications relevant to cutting-edge front-end technologies and eCommerce best practices.

📝 Enhancement Note: The career growth analysis is based on typical progression paths for senior software engineers in large technology companies, specifically within the context of eCommerce development. The "Operations Impact" section clarifies how a technical role contributes to business outcomes.

🌐 Work Environment

Office Type: The role is described as "Hybrid" with "Flexible home working" and "FREE Onsite Parking," suggesting a modern office environment that balances in-office collaboration with remote flexibility. The office likely promotes a collaborative atmosphere conducive to team sprints and technical discussions.

Office Location(s): The primary location is Leeds, West Yorkshire, United Kingdom. Specific details about the office amenities beyond parking are not provided, but it's reasonable to assume a professional corporate setting.

Workspace Context:

• The workspace is designed to foster collaboration among cross-functional teams, with opportunities for direct interaction with UX designers, Product Owners, and back-end developers.

• Access to modern development tools and technology stacks is implied, supporting efficient workflow and cutting-edge development practices.

• Team interaction is crucial for Agile methodologies, suggesting open-plan areas, meeting rooms, and informal collaboration spaces.

Work Schedule: A standard 40-hour work week is expected, with flexibility in how these hours are structured, particularly concerning remote working days. This flexibility is beneficial for developers who need focused time for deep work and coding.

📝 Enhancement Note: The work environment description is built upon the "Hybrid" work arrangement, "Flexible home working," and "Onsite Parking" details, inferring a modern, collaborative office setting that accommodates flexible working.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A brief call with HR or a recruiter to assess basic qualifications, cultural fit, and salary expectations.

• Technical Interview(s): In-depth discussions focused on React, JavaScript, front-end architecture, problem-solving, and experience with the required technologies. This may include live coding exercises or whiteboarding sessions.

• Portfolio Review/Technical Deep Dive: A session where candidates present their portfolio, discussing specific projects, their role, technical challenges, solutions, and outcomes. This is a critical stage for a senior role.

• Team/Hiring Manager Interview: A discussion with the hiring manager and potential team members to assess technical leadership, mentoring capabilities, collaboration style, and overall fit with the team culture.

• Final Decision: Based on all assessment stages, with a focus on senior-level contribution potential.

Portfolio Review Tips:

• Curate Select Projects: Choose 2-3 of your most impactful projects that best showcase your senior-level React development skills, performance optimization efforts, and experience with GraphQL/Apollo.

• Structure Your Narrative: For each project, clearly outline the problem, your specific role and contributions, the technologies used, the technical challenges faced, how you solved them, and the quantifiable results (e.g., performance improvements, conversion rate impact, user satisfaction).

• Highlight Collaboration: Be prepared to discuss how you worked with designers, product owners, and back-end engineers. Provide examples of effective communication and problem-solving within a team context.

• Demonstrate Performance Focus: Showcase specific examples of UI performance optimizations you implemented and the metrics that demonstrate their success.

• Technical Depth: Be ready to answer detailed questions about your code, architectural decisions, and your understanding of React's internal workings and best practices.

Challenge Preparation:

• Live Coding: Practice coding challenges focused on JavaScript, React, and common algorithms. Be prepared to articulate your thought process.

• System Design/Architecture: For a senior role, expect questions about front-end architecture, scalability, and how to design robust, maintainable UI systems.

• Problem-Solving Scenarios: Prepare to discuss how you would approach specific technical challenges related to performance, state management, or API integration in an eCommerce context.

• Mentoring Scenarios: Be ready to discuss how you would mentor junior developers or handle technical disagreements within a team.

📝 Enhancement Note: The interview and portfolio review process is tailored for a Senior UI Developer role, emphasizing technical depth, practical experience, and the ability to articulate complex technical solutions and contributions.

🛠 Tools & Technology Stack

Primary Tools:

• ReactJS: The core JavaScript library for building user interfaces. Proficiency in its component-based architecture, hooks, and ecosystem is essential.

• Node.js: Used for back-end services and potentially for build tools and server-side rendering. Understanding its integration with front-end applications is key.

• TypeScript: For static typing, enhancing code quality and maintainability in large-scale applications.

• Apollo Client: A comprehensive state management library for GraphQL, crucial for efficient data fetching and caching.

• Jest: A popular JavaScript testing framework for unit and integration testing of front-end components and logic.

Analytics & Reporting:

• Adobe Target: For A/B testing and personalization, directly impacting conversion rates and user experience.

• Web Analytics Tools (e.g., Google Analytics, Adobe Analytics): For tracking user behavior, site performance, and conversion metrics. While not explicitly mentioned, these are standard for eCommerce.

CRM & Automation:

• GitLab: The primary platform for version control, CI/CD pipelines, and collaborative development workflows.

• Figma/Storybook: Tools for design collaboration, prototyping, and building UI component libraries.

📝 Enhancement Note: This section lists the core technologies and tools explicitly mentioned in the job description, along with other commonly used tools in a modern eCommerce front-end development environment.

👥 Team Culture & Values

Operations Values:

• User-Centricity: A strong commitment to creating exceptional user experiences that drive customer satisfaction and engagement on the eCommerce platform.

• Technical Excellence: A dedication to writing high-quality, performant, and maintainable code, adhering to best practices in front-end development.

• Collaboration: A belief in the power of teamwork, with a focus on open communication and mutual support across cross-functional teams.

• Continuous Improvement: An ethos of always seeking to optimize processes, performance, and user journeys through data, feedback, and iterative development.

• Innovation: An openness to exploring and adopting new technologies and methodologies that can enhance the platform and drive business value.

Collaboration Style:

• Cross-Functional Integration: The team works closely with Product Owners, UX/UI Designers, and back-end developers, fostering a collaborative environment where diverse perspectives contribute to project success.

• Agile & Iterative: Embraces Agile principles, encouraging regular feedback loops, adaptability, and iterative development cycles.

• Knowledge Sharing: A culture where team members are encouraged to share learnings, best practices, and technical insights, potentially through code reviews, internal demos, or documentation.

📝 Enhancement Note: The team culture and values are inferred from the job description's emphasis on collaboration, user-centricity, Agile methodologies, and the use of specific tools that support these values.

⚡ Challenges & Growth Opportunities

Challenges:

• Scale and Performance: Maintaining optimal performance and scalability for a global, high-traffic eCommerce platform presents ongoing technical challenges.

• Rapid Evolution: Staying current with the fast-paced evolution of front-end technologies, particularly within the React ecosystem, requires continuous learning.

• Cross-Team Dependencies: Navigating dependencies with back-end teams and other stakeholders to ensure seamless integration and timely delivery can be complex.

• Balancing Innovation and Stability: Introducing new features and technologies while ensuring the stability and reliability of a critical revenue-generating platform.

Learning & Development Opportunities:

• Deep Dive into eCommerce: Gain profound insights into the intricacies of eCommerce operations, customer behavior, and revenue-driving strategies.

• Advanced Technology Adoption: Opportunities to work with and potentially lead the adoption of cutting-edge front-end technologies and architectural patterns.

• Mentorship and Leadership: Develop leadership skills through mentoring junior developers and contributing to technical strategy, paving the way for future leadership roles.

• Industry Exposure: Potential to attend industry conferences, workshops, and training sessions relevant to front-end development, eCommerce, and Avnet's broader technology landscape.

📝 Enhancement Note: Challenges and growth opportunities are identified based on the nature of the role (senior, complex platform) and the industry (eCommerce, technology).

💡 Interview Preparation

Strategy Questions:

• "Describe a complex UI challenge you faced on a large-scale eCommerce platform and how you architected a solution using React and Apollo Client. What were the key performance metrics you focused on?" (Focus on technical depth, problem-solving, and impact.)

• "How do you approach collaborating with UX/UI designers and back-end developers to translate Figma designs into a functional, high-performance user interface? Provide an example." (Assess collaboration and communication skills.)

• "Walk us through your process for ensuring UI performance and implementing optimizations like lazy loading or code splitting. How do you measure success?" (Demonstrate practical optimization skills and data-driven approach.) Company & Culture Questions:

• "What interests you about working for Farnell/Avnet and specifically on our eCommerce platform?" (Showcase research into the company and role.)

• "How do you contribute to a positive and collaborative team environment, especially in a hybrid work setting?" (Assess cultural fit and teamwork.)

• "How do you stay updated with the latest trends and best practices in front-end development, and how do you advocate for adopting them within a team?" (Evaluate continuous learning and proactive approach.) Portfolio Presentation Strategy:

• Tell a Story: Frame your project presentations as narratives: the challenge, your innovative solution, the technical execution (highlighting React, Apollo, Node.js, etc.), and the positive outcome (quantified impact on user experience or business metrics).

• Focus on Senior Contributions: Emphasize your leadership, architectural decisions, and mentoring roles. Clearly articulate what you specifically did that made a difference.

• Be Prepared for Deep Dives: Anticipate in-depth technical questions about your code, design choices, and problem-solving process. Have examples ready for performance optimization, API integrations, and testing strategies.

• Connect to Avnet's Goals: Where possible, draw parallels between your past successes and Avnet's objectives (e.g., driving site revenue, improving customer experience).

📝 Enhancement Note: Interview questions are designed to probe for senior-level expertise, problem-solving abilities, collaboration skills, and alignment with the company's needs and culture.

📌 Application Steps

To apply for this Senior UI Developer position:

• Submit your application through the provided link on the Avnet careers portal.

• Tailor your CV: Highlight specific experience with React, Node.js, Apollo Client, GraphQL, TypeScript, performance optimization, and eCommerce platforms. Quantify achievements with metrics where possible.

• Prepare your Portfolio: Curate a portfolio that showcases your best work, focusing on complex React applications, performance improvements, and collaborative projects. Be ready to present 2-3 key projects in detail.

• Research Avnet/Farnell: Understand their business, their eCommerce strategy, and their position in the technology distribution market. This will help you tailor your answers and demonstrate genuine interest.

• Practice your technical explanations: Be ready to articulate your thought process for coding challenges and to discuss your portfolio projects with technical depth and clarity.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.

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